Automatic magnetic tack hammer



I 1939' E. BLACKMON 2,170,468

AUTOMATIC MAGNETIC TACK HAMMER Filed Nov. 6, 1937 s Sheets-Shet 1 Inventor Ema B L A cmwo/v A iorrseys Aug. 22, 1939. E. BLACKMON AUTOMATIC MAGNETIC TACK HAMMER 3 Sheets-Sheet 2 Filed NOV. 6, 1937 Inventor 477/151 .BL/ac/(MO/V,

Aiiameya E BLACKMON AUTOMATIC MAGNETIC TACK HAMMER 3 Sheets-Sheet 3 Filed Nov. 6, 1937 Inventor Ema BLACK/140M,

Patented Aug. 22, 1939 warren STATES ATENT OFFICE.

halt to Henry W.

Stevens, Gulfport, Miss.

Application November 6, 1937, Serial No. 173,240

3 Claims.

This invention relates to a magnetic tack hammer, the general object of the invention being to provide a magazine for holding the tacks with means for feeding the tacks one by one to a point where they can be picked up by a magnetic member each time a trigger member is actuated to operate the magnetic member.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing the invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which:

Figure 1 is a top plan view of the invention with parts of the casing broken away and the rib forming member shown in pian where the casing is broken away.

Figure 2 is a section on ure 1.

Flgure 3 is a section on-the line 3-3 of Figure 1.

Figure 4 is a section on ure 1.

Figure 5 is a longitudinal sectional view through Figure l with parts in elevation.

Figure 6 is a view of the front end of the cylinder containing the grooved member with parts broken away.

Figure '7 is a spiral groove and which carries pawl.

Figure 8 is a view part of. said'ring and this View also showing a portion of the handle and the trigger bar with the cam thereon.

Figure 9 is a fragmentary elevation of the rotary longitudinally grooved member.

Figure 10 is an elevational view of the device with parts in section and showing the magnetic member in lowered position.

Figure 11 is av perspective view with parts broken away of the front end of the cylinder.

Figure 12 is a section on the line i2l2 of Figure 11.

Figure 13 is a section on the line iZi-Hi of Figure 11.

Figure 14 is a section on the line lt-i i of Fig. 11.

In these drawings the numeral 5 indicates an elongated member, the major portion of which is of circular shape in cross sectionand has at one the line 2-2 of Figthe line t-4 of Figview of the ring containing the the operating looking toward the under end thereof a hammer head 2 connected therewith, one end of the head being forked as shown at 3 and the adjacent end of the member I is also forked as shown at 4 and a groove 5 extends longitudinally through a side portion of the member I from the forked part 4 to a point an appreciable distance from the opposite end of the member I. That end of the groove which opens into the forked part 4 is widened as shown in Figure 5. A forked magnetic member ii is pivoted between the outer portions of the prongs .of the forked part 3, as shown at i, and a spring 8 on the pivot engages the parts to normally hold the member 6 in the position shown in Figure 5 or with said member 6 practically forming a continuation of the head 2. The member 6 is so formed that it will engage a part of the ends of the prongs so as to prevent the member 6 from moving outwardly beyond the position it occupies in Figure 5 but said member 6 can swing inwardly as will be hereinafter described.

A sleeve 9 encloses the major portion of the member I but terminates short of the forked part 4 thereof and this member 9 slidably holds in the groove 5 the trigger bar It which has a projection ll adjacent itsinner end which passes through a slot l2 in the sleeve. A spring M engages the bar to hold the same in a forward position but permitting the bar It) to be moved rearwardly by the finger engaging the trigger projection I l. A member l5, of the shape shown in Figure 5 is pivoted between the rear ends of the forked part 3 of the head 2 as shown at it and a link I! connects the trigger bar l0 with this member I5 in such a manner that when the trigger bar is moved against the spring by pressure upon the trigger projection II the member i5 is caused to engage the inner end of the magnetic member [6 so as to move the same inwardly and downwardly on its pivot, from the position shown in Figure 5 to that shown in Figure 10.

A drum I8 is rotatably arranged on the inner portion of the sleeve 9 and has a plurality of longitudinally extending grooves l9 therein and a cylinder 20 surrounds the drum and has one end piece 2| provided with the projections 2 l engaging a non-circular part I of the member I to prevent rotary movement of the cylinder or casing 20, the other end piece 22 having a large opening 22 therein for receiving a reduced annular part l8 of the drum in such a manner as to permit rotary movement of the drum. A spiral substantially T-shaped rib 23 is connected with the inner circumference of the cylinder or casing 20 and said rib forms a T-shape spiral groove 24 for receiving the tacks which are introduced into the cylinder or casing through a longitudinally extending opening 25' formed in the cylinder or casing, said opening being closed by a door 25, the hinge of which is shown at 26 and a latch of which is shOWn at 2'! in Figure 1. A ratchet wheel 28 is attached to .a small annular part I8 at the inner end of the drum and a ringshaped member 29 is rotatably supported on the sleeve 9 adjacent the inner end of the drum and carries a projection 30 which has a pin 3| attached thereto on which is pivoted a dog 32 for engaging the ratchet Wheel 28. A partial spiral slot 33 is formed in the ring member 29 and opens out into the inner circumference of the same and a sloping cam 34 projects from the trigger rod I for engaging the slot. As the cam moves through the slot the ring member 29 is given a partial turning movement which causes the dog or pawl 32 to engage the ratchet wheel 28 so as to move the drum a distance equal to the space between a pair of the grooves l9, so as to bring a tack in position where it can be picked up by the magnetic member. A holding dog 35 is provided for the ratchet wheel 2!? and this dog is pivoted to the end piece 22 of the casing or cylinder. Spring means 36 are provided for the dogs 32 and 35 as shown in Figure 2. A flange 9 is formed on the sleeve 9 and is located between the ratchet wheel and the ring member 29.

A handle 31 preferably of wood fits over a part of the sleeve 9 and acts to hold the parts in position as it rotatably holds the ring member 29 between its inner end and the flange 9' on the sleeve and said handle is held in place by the washer 38 and nut 39 engaging the threaded stud 40 projecting from the end of the member That end of the drum |8 adjacent the hammer head is rounded as shown at 4| with the ends of the grooves |9 located in said rounded portion and the end 2| of the cylinder or casing 29 is formed with a notch 42 which has one straight wall and the other wall is beveled and of arcuate shape as shown at 43, this wall 43 being of considerable length. The end of the spiral groove 24 is also of arcuate shape as shown at 24' and has a portion merging into the Wall 43 sothat a tack nearing the end of the groove 24 will be turned into substantially horizontal position when it reaches the low part of the notch 42 so that the head of the tack can be engaged by the end of the magnetic member 6 after the same has been swung over by operation of the trigger means. To accommodate this arcuate-shaped part 24 of the groove the rib forming member 23 at the front end of the casing is widened as shown at 23 and this widened part and a portion of the top of the casing curve downwardly to join the arcuate-shaped wall 43 of the notch 42, as shown more particularly in Figures 5, 11, 12, 13 and 14, and these parts are also curved downwardly circumferentially so that the front wall of part 24' of the groove will merge into the wall 43 of slot 42 adjacent the bottom or lower end of the slot, 2. portion of the bevel wall of which forms a continuation of said front wall of part 24 of the groove. A short longitudinally extending slot 46 is formed in the wide part 23' of the rib forming member 23 and in the top of the casing and this slot 46 is in alignment With the main part of the notch 42, this slot 45 exposing the front end of the groove ill in the rounded end of the drum so that the entire length of the tack will be exposed when it is in position to be picked up by the magnetic member, as shown in Figure 1. A rectangular-shaped member 45 extends across an upper portion of the end 2| of the casing or cylinder with its upper edge passing directly across the lower or inner end of the notch 42 and this member prevents the magnetic member from moving downwardly beyond a position where it can pick up a tack. When the device is to be filled with tacks the door 25 is opened and when the door is so opened it exposes a groove IS in the drum I8. The tacks are dropped into said groove IS in a row and then when a sufficient number of tacks has been placed in said groove IS the trigger member is operated to give the drum a partial rotation which brings another groove |9 at the door opening. Then tacks are placed in this second groove and this is continued until the device has been filled with tacks. When the magazine is full and it is desired to use the device the trigger H is pulled back against the action of the spring and this movement causes the member to swing the magnetic member 6 over to a point where its free end will be located adjacent the notch 42. This same movement of the trigger will cause the cam 34 on trigger bar to pass rearwardly through the slot 33 in the member 29, which causes said member 29 to slightly revolve in a counterclockwise direction and this movement of the member 29 causes the dog 32 to move the ratchet Wheel 28 in the same direction which results in the movement of the drum 2. distance equal to the space between two of the grooves IS in the drum. This movement of the drum by the trigger mechanism will properly position a groove |9 under the door opening and also bring a groove l9 under the slot 46 and deposit a tack in the notch 42 where it can be picked up by the magnetic member 6. This movement of the drum causes the tacks to move along the spiral groove 24 and causes one tack to pass from the end por tion of the part 24' of the groove into contact with the magnetic member. As will be seen from Figures 11, 12, 13 and 14, as tacks enter the part 24 of the groove they are gradually turned from a substantially vertical position to a final horizontal position as they enter the bottom of the notch 42 and it will also be seen from these figures that the front wall of the part 24 of the groove gradually merges into the beveled wall 43 of the end 2| of the cylinder adjacent the bottom of the notch 42 so that the head of the tack finally engages said beveled wall 43 as shown in Figure 14. When the trigger is released the spring l4 pushes the parts forwardly so that the magnetic member returns to a vertical position with a tack held in position for driving and the other parts are returned to normal position ready for a next movement of the trigger means.

The device can be made to handle tacks of diiTerent sizes and it can be made to handle nails and the like. The device can also be provided with an extension handle with an auxiliary line running to the trigger so that the hammer may be used for work beyond the reach of the usual handle.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts provided that such changes fall within the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. A magnetic hammer comprising an elongated member, a hammer head at one end thereof, a magnetic member pivotally connected with one end of the head, means for normally holding the magnetic member in parallel relation to said head, a trigger member, means operated thereby for swinging the magnetic member to a position to pick up a nail, a nail magazine on the elongated member including aninner drum rotatably supported on a part of the elongated member and having longitudinal grooves and an outer stationary casing enclosing the drum and having an internal spiral rib having its walls shaped to support the heads of nails placed in the magazine, and means actuated by the trigger member for rotating the drum step by step.

2. A magnetic hammer comprising an elongated member, a hammer head at one end thereof, a magnetic member pivoted to one end of the head, spring means for normally holding the magnetic member in parallel relation to said head, a drum rotatably arranged on the elongated member and having longitudinal extending grooves therein, a stationary casing surrounding the drum and having aninternal spiral rib thereon of T-shape in cross section, a door in the casing for permitting articles to be fed into the spiral groove formed by the rib with parts extending into the grooves of the drum, portions of the grooves at the discharge end being shaped to place an article leaving the groove in a substantially horizontal position, trigger means, means actuated thereby for moving the magnetic member to a position Where it will engage the head of an article leaving the groove, and ratchet means operated by the trigger means for moving the drum step by step.

3. A magnetic hammer comprising an elongated member, a hammer head at one endthereof, a magnetic member pivoted to one end of the head, spring means for normally holding the magnetic member in parallel relation to said head, a drum rotatably arranged on, the elongated member and having longitudinal extending grooves therein, a stationary casing surrounding the drum and having a spiral rib thereon of T- shape in cross section, a door in the casing for permitting articles to be fed into the spiral groove formed by the rib with parts extending into the grooves of the drum, portions of the grooves at the discharge end being shaped to place an article leaving the groove in a substantially horizontal position, trigger means, means actuated thereby for moving the magnetic member to a position Where it will engage the head of an article leaving the groove, ratchet means operated by the trigger means for moving the drum step by step,

said ratchet means including a rotary member, a cam on the trigger means for oscillating the rotary member, a dog carried by the rotary member, and a ratchet wheel connected with the drum and engaged by the dog.

ETI-IEL BLACKMON. 

